The PDF file of all problems can be downloaded HERE
3 3 3 .o. .x. o.o 4 4 .... .ox. .xo. .... 5 5 .ooo. .x... ..xoo x.xoo .ox.x
Case #1: 14 Case #2: -1 Case #3: 28
Migrated from old NTUJ.
Regional Chengdu 2011